Feeding mechanism for blindstitch sewing-machines.



L. GNDBRDQNK. l PEDING M EGHANISM PUR BLIBDSTITCE SEWING MACHINES. l

* AlfPLIoATIo'f: HLM) Amm, `190s.

mente@ 'Jam 1?, 1911..

4 SHEETS-SHEET 1.-

, L. ONDERDNK. 'v 1 FEEDING MEGHANISM POR B}L.I1\DS'IITGI SEWING MACHINES.

APPLIOATION'HLBD APR. 9 190s.

mend .im '17, 1911.

4 SHEETSQSHBEM.

` l L. ONDERDONK. 'A FEEDING MBCHANISM' POR BLINDSTITGH SEWING MACHINES.

APPLIGTION FILED APB.. 9, 1903.

` Patented Ja.11. 17, 1911.

4 SHEETS-SHEET 3l.

To all whom it may concern: i

onirico sri-tiras LANSING 'oND'nRDoNK or NEW YORK, N. Y., AssIGNoR 'ro UNION SPECIAL SEWING" MACHINE COMPANY, OF CHICAGO, ILLINOIS, CORPORATION 0F ILLINOIS.

FEEDING MECHANISM. FOR BLINDSTITCI-I SEWING-MACHINES.

Specification of Letters Patent.

u raeeaeeae'an. 17,1911.

Application filed April 9, 1903. Serial No. 151,788.

Be it known that I, LANSING ONDERDONN, a citizen of the United States, residing at New- York, in the county of New York,

State of New York, have invented certain new and'useful Improvements in Feeding Mechanism for. Blindstitch Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to an improvement in feeding mechanism for sewing machines,

and particularly to a wheel feed .mechanism for a blind stitch -:sewing machine of the type set forth in various patents' granted to nie February 17, 1903, Nos. 721,077, et seg.

The invention consists in the various matters hereinafter described and referred -to in the appended claims.

In the .accompanying drawings which illustrate theI invention, Figure l is a top plan View partly in section, of sol-much of a blind stitch sewing machine as is necessary to a complete understanding of the invention. Fig. 2, is a sectional rear end view of the same;.Fig. 3, is a detail sectional view showing the construction of 'the wheel feed; Fig. 4.-, is a detail end view of the feed mechanism showing a modified construction of ridge forming ring;v Fig. 5, is a. side view ofa portion ofFig. et, illustrating the relation of the needle; Fig. 6, is-a side view of Fig. `4; Figs. and 8 are respectively side and end views of the wheel feed mechanismv of a blind stitch sewing machine, embodying the invention. I y

I In these drawings, represents the cylindrical work support, which is hinged at its rear end to the standard B and adapted to be raised and lowered by means of thelever C, t0 allow of the reinoval"and insertion of fthe work.

D represents the driving shaft of the mai .i lchine, to which power is applied `by a belt, of the belt wheelF. 'Projecting from this main shaft isan eccentric connecting rod z' which at its .Lower end is secured by a ball i. `and socket' connection-to the horizontal lever Z. .The lever Z is iXed at its outer end to the shaft m, journaled in ,bearings in lugs on the front of the machine standard, and is provided at its forward endwith a curved', slotted cross-head, in which is fitted the head of a bolt. On this bolt is-a ball sleeve, held firmly in place by a nut and washer.

`Aronndthe ball sleeve is clamped one end of theconnecting lever s, the opposite end of which has a ball and socket connection with abell crankA or similar lever F, one arm of which a, carries a `pawl adapted to mesh with a ratchet wheel G, fixed to the feed/shaft H. Bell crank lever F is falcrumed 'or pivoted on the end of the shaft H and as the main shaft rotates, an intermittent rotary motion will be impartedto the shaft H.

It will be understood that instead of the -pawland ratchet clutch, a friction clutch may be used, and whether one or the other is used, va friction spring as shown in Fig. 2, would have to be used to overcome the back action rof the pawl or clutch, and the. inertia ofthe shaft. H. f

The feed shaft H carries, at its'onter end', ,u

the wheel feed inechanisn 1, one form of this being shown in detail in Fig. ItV is made up of three parts K, IQbeing 'the rotating feed wheels, and K, being a ring larger in 'diameter than the feeding parts and having mitted to the parts of the feedwheel, which" project up through the work support and by cooperation with a suitable presser foot. the goods are crimped and the vfeed takes place. The presser foot is preferably of the construction shown in Figs. et, 6, T and 8, that is, it embodies a rocking frame I p'ivoted to the presser bar X,'each arm ofthe frame'l carrvin two rollers L which are beveledto conform to the .periphery of the feed dogs K', and which have a space between thenn' which cooperates .with the ridge forming ring K, 'to crimp the goods. roller presser is of special advantage in a machine of this construction for "various This form of."

reasons, sone of which are, that both rollers resting on the same feed, one forward the le other 'back of the line of needle travel', they vhold the material jto'fbe sewed down, and

with properpressure upon-them, sufficiently firm for-.the :needle ,to puncture the material without the' material or edges tovbe servedl 5. o r overcast, getting out of place, at the same tunemakin la good openingin which the needle-and' ooper may operate and for thel operatort see and guide the work. This .arrangement will `'also' hold 1 the materiall tant, so that'when the needle moves-back, it-

williica 'st a -proper loop. for the' loopento ente t'being ndeistoodthat if the matef ed would not. holdfirmly or taut,

ell

- oting'tlie roller supporting4 frame I, isnto vstitch in the well known manner.

s other by gears' n permit either roller to ride over a seam or As shown in Figs. 4,15'iand 6, the ridge 'forming'ring is provided at'intervals with -pio]ect1ons M, whereby, as' for instance, in 'the sewing of 'a hat sweat, t'o hats with the reed and covering, at intervals the vgoo-ds may -be 'c rimpedn'iorethan at other times -and thus a stitch is taken'into the 4body of thehat at such intervals.

InFig 49, is shown va modificati-on of' myl invention,- in which two. roller feeds, arranged on shafts,

shaft' is. preferably' made to travel faster than' the'- forward o-ne,."which 'arrangement acts to kee'p the vmaterialbetween the front' andthe rear rollers taut. The wo-rl:l supis' provided with the usual crimping rib N', when the two roller feeds'are used,

' and the needle lN 'passes through Vthe mate'-A rial supported on said-rib, tov make the blind same resultl 'might be secured by a difference in size of the feed wheels, running them'at the saine speed. Should it be desirable to full the materialbeing sewed, then the front f eed wheel should he made to travel faster than the other.

Various minor modifications and changes may be made without departing from 'the' spirit of my invention.

fHaving hus described my invention,

what I claim and desire to secure by Letters P atentisr'- y 1. In a sewing machine having a work support, with means for raising andlowering it to allow of the insertion and removal of the work, a feeding device carried there by, 'andi comprising rotating feed wheels adapted to project above the work support,

l heneedle receded,..thecl'oth moving Awithfr t;'would prevent the 'castingl of the Aloop' from the needle. The purpose ofpivo ands, thus providing a This,

yand a ridge forming ring located between the feed wheels'and rotating therewith,- and i' -v means for rotating said feedwheels, com- Jprisiiig a shaft extending lengthwiselof the 'work support and means for intermittently y rotating said shaft; comprising adrivin-g- Shaft, a ratchet wheel 4xed to Athe feed shaft, "a bell crankl lever fulcrumed-thereon,

one armcarrying a, pawl,' engaginrr the ratchet and Iconnections' between the driving vshaft and' the bell lcrank-lever; substantially y as described;

2. In'a sewing machine' having `a workv` support, with means for raising-'and lower '4 ing it to allow of the insertion and removal of the work, a feeding device carried ,the'reby, and comprising rotating feed wheels adaptedto project above'the work supprt," a'nd a ridge formingring locatedbiet'we =.-r'i

the' feed .wheels and 'rotating therewith, I 'means OI IOtfng Said feed wheels,-com pris ing a shaft extending lengthwise of the work support-and'means for intermittently rotat ing said shaft, comprising a driving shaft, a

ratchet wheel fixed to thelfeedt'shaft, a 'hell crank lever fulcrumed thereon, one armcarryinga pawl, .engaging the ratchet and connections between the-driving shaftgan'd the belll cranklever, said connections including'- an eccentric connecting rod, a horizontal.

lever attached'thereto, and pivoted to a rock shaft on the machine standard, and a' coninecting rodl having an' adjustable connection with said rock ner end with the'bell `crank leverj substantially as described.-4

l3'. 'In a sewing machine'having a .work

shaft and connected iat itsjin-f support extending horizontally from the.

standard and hav-ing its free endlocated beneath the needleand looper mechanism, means Afor raising and lowering said'work' support, a` feed shaft, extending lengthwise of said work support, annularfeeding de# vices carried on the outer endof said shaft,

and a ridge forming ring 'between said feed-- therewith, and havv ing devices and moving ing pro] ections at'inte'rvals onl its periphery;

substantially .as described.

t. In a sewing machine having a work support extending horizontally from` the vstandard and having its free end located Abeneath the needle andloopei mechanism, means for raising `and lowering' said lWork support, a feed shaft,.extending lengthwise of said work support, annular feeding'devices carried on theouter end of said shaft,

and a ridge forming ring .between said feed;

resser .feeClWheelS upon oppositeesides ofthe ring; substantially as described;- Y

ing devices andmoying therewith, and a' foot having rollers bearing' upon :the .125'

5. In a sewing machine havingga'l'work support extending horizontally standard "and having; its" free end located "beneath the needle and loopen mechaniS from lthe f lmeans for raising and lowering said .work support-,a feed shaft, extending'lengthwise -of said work support, annular feeding de` `vices carried on the outer end of said shaft,

and a.ri`dge form-ingri'ng'between said feeding devices and moving therewith, and a pressing device comprising a pivoted frame liavmg ysets ofV rollers in frontan'd 1n rear of the needle and looper, eachiset beingcomposed of two rollers bearing upon the feed wheels upon opposite sides o f the ring; sub-` stantially las described.

6511i a sewing 'machine liaving-va'fwork Isupport, a feedingnieclianism carried thereby and pro]ecting above`sa1dwork support,

l v J s'aid feeding mechanism including two' beve'led wheels having serrations thereon, a ring v secured. thereto, and located 'between them and liayingla rib` proJecting abovetlie feed wheels, niean's forgiving said feed 'wheels movement relative to said work support for moving the material onfsaid work support and la complement-al. pressing-device; ysub-v stantially :as described.

"7. In a. sewing machine having a-worl;Y

support, a' feeding *mechanism including two feeding wheels, one: in -front and one in rear of the stitch formingy mechanism, each feed- 'in'g wheel including/a ridge forming ring and stitch' forming mechanism includingane inrear of Saidneedle and means for operating said feeding wheels. y

9. In a sewingI machine :having a vwork support, a" feeding mechanism including two sets of feeding wheels, one in'front and one in rear of the stitch 'forming mechanism, each set including a ridge forming ring and stitch forming mechanism including a needle V intersecting a plane containing .said ridge forming rings; substantially als'described.

support, a feeding mechanis'niincluding two sets of feedingwheels, one in front and onel in rear of they .stitch forming-mechanism, j

each'set including a ridge' foriningring, vand pressing devices "coperatiing witlin'eajch set and stitch forming mechanisniincludinga yneedle'intersecting a plane contain-ing'said ridge .forming rings; substantially asl de-l l scribed. c

1l. In a sewing machine having a Work support, a feeding mechanism including` 1two sets of feeding wheels, one in front ,and one 41n rear of the stitch'forming mechanism,

each set including a ridge forminfg 'ring,'and means for rotating the sets at varying rates of' speed and'stitch forming .mechanism including a needlel intersecting a .planel containing said' ridge forming rings; 'subst-ane 'tially as described.

12. In a sewing'machine Ihaving 'a normally stationary worksuppor't, w1tli means for raising and lowering it, a 4feeding mech'- anisnri carried thereby and-'projecting above' said worksupport, .and including a beveledv lrotating feeding ring having srrations thereon and a ridge forming ring secured thereto, the latter projecting above the sur- 4face of the annular feeding ring and a Aneedle 'and looper arranged above the work support, with a pressing device'bearing uponl the annular feeding ring,I provided r'with a space to allow the 'ridge forming riiig to' project for the purpose of crimping the goods; `substantially as described.

, In testimony whereof I aiiiX my signature, inI presence of two witnesses.

LANSING oii'n'iinnoix-ii.v

lVitnesses v FL A. NORTH, (L. SWIFT.

' '10.l In a sewing 'machine lia'ving ya' work, 

